Hoisting mechanism.



PATENTED Amma, 1905. y

APPLICATION FILED NOV. 8.1904.

'2 SHEETS-SHEET 1. y

No. 787,444. PATENTED APR. ls. 1905.

M. c. HALL.; HOISTING MBGHANISM.

APPLICATION FILED NOV. 8,1904.

. dfcf, awww Fatented April 18, 1905.

PATENT OFFICE.

MONROE C. HALL, OF WINCHESTER, IDAHO.

HOISTING IVIECHANISNI.

SPECIFICATION forming part of lLetters Patent No. 787,444, dated April18, 1905.

Application filed November 8, 1904. Serial No. 231,876.

To @ZZ 11171/0711, it may concern:

Be it known that I, MONROE O. HALL a citizen of the United States,residing at Winchester, in the county of Nez Perces and State of Idaho,have invented certain new and useful Improvements in HoistingMechanisms, of which the following is a specification.

This invention provides a novel form of actuating means for operatingthe hoisting-rope of a lifting-fork for supplying grain to the feeder ofa threshing-machine, the purpose being to derive the operating power forsaid actuating means from the loose portion of the main drive-belt.

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction of the means foreffecting' the result reference is to be had to the followingdescription and accompanying drawings.

I/Vhile the invention may be adapted to different forms and conditionsby changes in the structure and minor details Without departing from thespirit or essential features thereof, still the preferred embodimentthereof` is shown in the accompanying drawings, in whichh Figure 1 is aperspective View showing the invention applied to aderrick-fork-hoisting or threshing' machine. Fig. 2 is a longitudinalsection of the actuating means for operating the hoisting-ropes. Fig.3is a top plan view of the parts shown in Fig. 2.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The main drive-belt 1 for imparting motion to the threshing mechanismderives its power from a portable traction-engine (not shown) in theusual way, and its loose porv tion is utilized for operating theactuating 6, loosely mounted upon a shaft 7, secured in bearingsattached to timbers 8 of the derrickwagon. Collars 9 are secured to theshaft 7 by set-screws and are arranged upon opposite sides of the wheel6 and prevent its movement longitudinally upon the shaft 7. Woodenlblocks 10 are bolted to opposite-sides of the Wheel 6, and their outerportions are beveled to form tapered parts 11, each adapted to coperatewith the inner tapered wall 12 of a rim or band 13, extended laterallyfrom the inner head of a drum or windlass 14, upon which thehoisting-rope 15 is adapted to Wind. The outer face of the rim or band13 is straight and constitutes a brake member, with which a brake-band16 coperates to hold the drum 14 in a given position When disengagedfrom the Wheel 6.

The wheel 6 will be designated hereinafter as the driven since the drums14 when clutched thereto are driven thereby. In the preferredconstruction each side of the driver 6 is provided with a block 10, ofWood or other fibrous material, and a drum 14 is located at each side ofthe driver and is mounted upon the shaft 7 to receive both a rotary anda longitudinal movement. Inasmuch as the coperating mechanism for eachdrum is the same, a detailed description of one only will be given. Aboss17 projects from the outer head of the drum and is formed with anannular groove 18, which receives a lug 19 at the inner end of a bar 20,which is secured to a collar 21, loosely mounted upon the shaft 7 andconfined between the drum 14 and a cam 22, secured to the shaft 7. Theface of the collar 21 adjacent to the boss 17 is straight, whereas theouter face is inclined or cam shape to match the adjacent side of thecam 22, whereby a turning of the collar 21 in one direction will movethe drum 14 on shaft 7 toward the driver 6 and bring the parts 13 and 10in frictional engagement and cause the drum and driver to rotate inunison. A lug 23 is provided at the outer end of the bar 20 and engagesWith the outer side of the cam 22. Upon turning the collar 21 in theopposite direction the lug 23, riding upon the cam 22, effects anoutward movement of the drum 14 and disengages it from the driver 6, andupon IOO instant application of the brake 16 the drum may be held in therequired position, and by proper manipulation of the brake the fork maybe permitted to descend with greater or less speed. A lever 24 projectsoutward from the collar 2l and serves as convenient means for operatingthe same to effect either inward or outward movement of the drum 14.Alever 25 is connected with the brake-band 16 to tighten or loosen thesame, as may be required. This lever may be conveniently located so asto be operated either by foot or hand.

The provision of two drums enables the use of two forks, and one may beelevated and the other lowered, and vice versa, thereby admitting of theaction being practically continuous. By mounting the drums upon astationary shaft the wear is reduced to the smallest amount possible,thereby saving machinery, power, and lubricant.

While the invention is intended more particularly for derrick-forkhoisting, it may be employed in hoisting machinery generally where thedrum is required to be thrown frequently into and out of gear or indeep-well pumping apparatus.

Having thus described the invention, what is claimed as new is- 1. Inactuating mechanism forhoisting machinery, the combination of a shaft, adriver loosely mounted upon said shaft, a drum, a brake cooperating withthe drum, a cam secured to the shaft, acollar arranged between said camand drum and having positive connection with each, and alever extendedfrom said collar to admit of turning the latter in either direction tomove the drum either toward or from said driver, substantially assetforth.

2. In actuating 'mechanism for hoistingmachinery, the combination of afixed shaft, a driver loosely mounted upon said shaft to turn freelythereon but prevent it from longitudinal movement, a drum mounted uponsaid shaft to turn'and move longitudinally thereon, a clutch betweensaid driver and drum, a cam secured to the shaft a short distance fromthe drum, a collar loosely mounted upon the shaft between the drum andcam, means for positively connecting said collar to the drum and cam,and means for turning the collar in either direction to effect positivemovement of the drum either`toward or from the driver, subtantially asset forth.

3. In combination, a stationary shaft, a driver' loosely mountedthereon, set-collars secured to the shaft upon opposite sides of thedriver, drums loosely mounted upon the shaft and arranged upon oppositesides of the d river, a clutch between each drum and driver, a brake foreach drum, and independent means mounted upon the shaft for effecting apositive movement of each of the drums either toward or from the driver,substantially as set forth.

4. In combination, a fixed shaft. a driver`

